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V850 FAQ What's new

2008/02
V850 : Ratings
   CLKOUT synchronization and CLKOUT asynchronization standards (common to V850)

2007/03
V850 : Pins..DC Characteristics, Pin Handling
   Processing of port/control alternate-function pins [V850E/MS1]

2006/04
V850 : Writing to Flash Memory
   Tools for writing to internal flash memory [V853]
V850 : Watchdog Timer
   Initialization with watchdog timer interrupts [V850/SA, V850/SB]
   Starting and stopping the watchdog timer by program
   Operation following timeout of watchdog timer [All V850]
V850 : Timer, Counter
   I cannot release STOP mode by using an INTP0n0/1 interrupt [V850/SV2]
   Pulse width measurement with 8-bit timer [V850/SB]
   Timer 2 operation [V850E/1A]
   Timer/counter function [V850ES/Kx1]
   Using a 16-bit timer as an interval timer [V850ES/Kx1]
   Sequence of settings in timer control register [V853]
   About settings for interval time
   Synchronization of multiple timers (simultaneous count start) [V850E]
   Output waveform when CRn0/1 is changed during processing [V850/S]
V850 : Serial Communication
   How to use the clocked serial interface with automatic transmit/receive function [V850ES/Kx1]
   I would like to transmit data via 3-wire serial communications, but I cannot get any clock output for this. [V850ES/Kx1]
   I cannot issue a start condition via the I2C bus [V850ES/Kx1]
   Timing of UART transmission interrupts [V850ES/Kx1, etc.]
   What is the timing for setting PM22 to "1" during serial communications? [V850E/MS1]
   Serial communication reception does not start.
   Prewriting 2 bytes of data at transmission start [V850E/MA1]
   Cautions regarding power application when performing UART communication between two CPUs
   No communication interrupt occurs after data output
   When using T02 or T03 as the clock output, can the T02 or T03 output pin be used as a normal port?
   Basic operation of 3-wire serial communication (almost all contents common to all devices)
   Basic operation of asynchronous communication (almost all contents common to all devices)
V850 : ROM Correction
   Details of ROM correction [V850/S]
V850 : Reset
   What is the timing for canceling a reset? Is it based on the rising edge or the level?
V850 : Programming
   What should be done (commonly) first after reset and start [common to V850]
V850 : Power Supply
   What mode reduces the power supply current most? (for lower power consumption)
V850 : Pins..DC Characteristics, Pin Handling
   Pull-up resistance values for unused pins and bus lines
   Can P00 to P07 be connected to VDD when they are not used? [V850E/MA1]
   Maximum value for pull-up resistors
V850 : Other
   Image of the internal peripheral I/O area
   Composite theoretical performance of uPD703015A (V850/SA1)
V850 : Other Peripheral Functions
   Please explain how the system wait control register (VSWC) is used. [All V850E and V850ES]
   When using the P111/A1/WAIT pin for wait function, can ports 3, 10, and 11 be used for address output? [V850/SB1]
   Can port input data be recognized even when the port has been set to control mode?
   Which sampling edge of the WAIT signal is the correct one? [V850E/MA1]
   Can an undefined state be avoided by writing a value to a port with an undefined initial value before the undefined port is set to output mode?
V850 : Memory
   Is the peripheral I/O register's address FFFFFxxxH? [V850E/MS1]
   Can the internal ROM be disabled and an external ROM used instead? [V850/SA1]
V850 : Interrupts
   Basic operations of interrupt servicing
   Interrupts triggered by software [All V850]
   Initialization during interrupt service [All V850]
   Interrupts and manipulation of the interrupt control register [All V850]
   Bus access and interrupts [All V850]
   Interrupt handler address [All V850]
   Interrupt occurs during servicing of another interrupt [All V850]
   Multiple interrupts [All V850]
   Initial interrupt during UART transmission [All V850]
   Exception processing of illegal instruction code
   Can an interrupt be generated using the external interrupt pin level? [All V850]
   Edge judgment method during interrupt [All V850]
   Interrupt handler address
   Only one interrupt is output.
   Interrupts doesn't work. (3) [All V850]
V850 : I2C Bus
   Overview of I2C bus
V850 : Execution Time
   Programming area that allows the fastest processing
   MIPS value calculation
   Execution speed [All V850]
V850 : DMA
   DMA transfer with I2C bus [V850/SB]
   Wait during flyby transfer [V850E/MA, V850E/MS, V850E/ME]
   Bus width for flyby transfers [V850E/MA, V850E/MS, V850E/ME]
   Endian ordering for DMA [V850E/MA1, V850E/MA2, V850E/ME2]
   Misalignment by DMA [V850E/MA1, V850E/MA2, V850E/ME2]
V850 : Difference between PPG output and PWM output
   Difference between PPG output and PWM output [contents common to all devices]
V850 : Clock
   STOP mode during operation of subsystem clock [Common]
   Relationship between reset and clock oscillation [All V850E]
   Clock settings in PLL mode [V850ES/SG2, SJ2]
   Switching to the subsystem clock [V850/S]
   How can I dynamically change the clock in order to reduce power consumption? [V850E/MA1]
   How much clock jitter and duty are allowed? [V850E/MA1]
   Operation with 6.78MHz external clock [V853]
   Can a 5-MHz input be used for the X1 input during PLL mode? [V853]
   Relationship between external clock and operating clock [V853]
   Can the CERALOCK (resonator) be used in any mode other than PLL mode? [V850E/MS1]
   50MHz clock input [V850E/MA1]
   Switching time from subclock to main clock [V850]
V850 : CAN
   CAN ; Settings in the various registers [V850/SF1]
V850 : A/D, D/A Conversion
   Clearing of CE bit of A/D [V853, V850E/MS, V850E/MA, etc.]
   Conversion results are unstable (fluctuates to adjacent channel value) [V850/SF1, V850/SA, V850/SB, V850/SC]
   The A/D converter value is not correct.

2002/04
V850 : IEBus
   "Simplified version" of the IEBus controller
V850 : DMA
   DMA transfer mode [V850/Sxx]

2002/02
V850 : Debug..IE ID
   When there is an interrupt request on the in-circuit emulator, the STOP mode is not released. [V850/SA1]

2001/11
V850 : Debug..IE ID
   Socket required for V850/SV1 (BGA) development.
V850 : Clock
   Proper use of BUSCLK and CLKOUT [V850E/MA1]











































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